Visible-light　driven　photocatalyst,　Ag/ZnO　flower　(ZnO　Fl)　heterostructures,　was　prepared　on　indium　doped　tin　oxide　(ITO)　glass　via　a　simple　photoreduction　method　without　surfactants.　The　samples　are　characterized　by　X-ray　diffraction,　scan　electron　microscopy,　X-ray　photoelectron　spectroscopy,　UV-vis　spectroscopy,　photoluminescence　spectra　and　photocurrent　response.　The　results　show　that　ZnO　FRs　are　wurtzite　phase　with　single　crystalline　grown　along　the　[001]　direction　and　Ag　nanoparticles　(NPs)　located　on　the　surface　are　metallic.　The　binding　energy　of　Ag　3d　for　the　Ag/ZnO　Fls　sample　shifts　remarkably　to　the　lower　binding　energy　compared　with　the　corresponding　value　of　pure　metallic　Ag　attribute　to　the　interaction　between　Ag　and　ZnO　Fls.　Ag/ZnO　Fl　heterostructures　exhibit　higher　visible-light　driven　photocatalytic　activity.　It　is　suggested　that　photo-induced　electrons　are　generated　from　Ag　due　to　surface　plasmon　resonance,　and　transfer　from　Ag　to　ZnO　Fls.　Then　the　electrons　interact　with　adsorbed　oxygen,　finally　forming　hydroxyl　radicals　(center　dot　OH),　and　the　visible-light　driven　photocatalytic　efficiency　is　enhanced.　The　proposed　mechanism　is　further　confirmed　by　the　photoluminescence　and　transient　photocurrent　response.　Additionally,　the　as-prepared　Ag/ZnO　Fls/ITO　as　a　convenient　photocatalytic　device　can　be　recycled　without　centrifugation.　(C)　2012　Elsevier　B.V.　All　rights　reserved.